Laser not keeping constant speed while engraving, stutters

Hey all! I’m currently in the process of building my own corexy laser cutter. After some first tests i noticed an issue when engraving: the laser is constantly changing speed and stuttering. It seems to be moving faster when the laser (not connected yet) is on.

It seems to be a Software issue as everything workes fine when engraving at a lower DPI.

I’ll link two Videos, one with 200 DPI and one with 10.

https://drive.google.com/file/d/1gXLRiGekGC5o5CdourZM-_XVHMCEsuBS/view?usp=drivesdk
https://drive.google.com/file/d/1gV2olZ4-Do8rG-_T0PhTFgxil6lcmqB7/view?usp=drivesdk

I’m using a MKS dlc32, running directly through usb, fast whitspace scan is disabled.

Really hope someone can help me, been trying so solve this for the past few days…

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